← Squares up to 30 lesson New set →

Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 334 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.11² =
  2. 2.21² =
  3. 3.14² =
  4. 4.28² =
  5. 5.24² =
  6. 6.12² =
  7. 7.16² =
  8. 8.23² =
  9. 9.26² =
  10. 10.15² =
  11. 11.27² =
  12. 12.22² =
  13. 13.25² =
  14. 14.18² =
  15. 15.29² =
  16. 16.13² =
  17. 17.29² =
  18. 18.19² =
  19. 19.17² =
  20. 20.11² =
  21. 21.27² =
  22. 22.26² =
  23. 23.18² =
  24. 24.21² =
  25. 25.24² =
  26. 26.17² =
  27. 27.18² =
  28. 28.27² =
  29. 29.22² =
  30. 30.14² =
  31. 31.12² =
  32. 32.24² =
  33. 33.21² =
  34. 34.21² =
  35. 35.22² =
  36. 36.24² =
  37. 37.13² =
  38. 38.26² =
  39. 39.13² =
  40. 40.21² =

Answer key

  1. 121
  2. 441
  3. 196
  4. 784
  5. 576
  6. 144
  7. 256
  8. 529
  9. 676
  10. 225
  11. 729
  12. 484
  13. 625
  14. 324
  15. 841
  16. 169
  17. 841
  18. 361
  19. 289
  20. 121
  21. 729
  22. 676
  23. 324
  24. 441
  25. 576
  26. 289
  27. 324
  28. 729
  29. 484
  30. 196
  31. 144
  32. 576
  33. 441
  34. 441
  35. 484
  36. 576
  37. 169
  38. 676
  39. 169
  40. 441

Free mental maths lessons, practice and worksheets at talentjr.in/mental-maths